216 



SAXIFRAGACEjE. I. SAXIFRAGA. 



radical ones rosulate, glabrous ; cauline leaves cuneated, clothed 

 with glandular hairs. Pedicels 1-flowered, and are as well as the 

 calyxes clothed with viscid hairs. Petals obovate, dark purple. 

 Genitals inclosed in the calyx. 



Middle Saxifrage. PL to foot. 



83 S. LAPEYROU'SII (D. Don, in Lin. trans. 13. p. 397.) 

 radical leaves aggregate, Ungulate, quite entire, with cartilagi- 

 nous margins ; flowers panicled ; petals obovate, quite entire, 

 connivent, longer than the calyx. If. . H. Native of the Py- 

 renees, on calcareous rocks. S. luteo-purpurea, Lapeyr. pyr. 

 sax. p. 29. t. 14. S. ambigua, D. C. Peduncles and calyxes 

 clothed with purple down. Very like S. media, but differs in 

 the flowers being panicled, and citron-coloured. Said to be a 

 hybrid between S. media and S. aretioldes. 



La Peyrouscs Saxifrage. PI. to J foot. 



84 S. ARETIOIDES (Lapeyr. pyr. sax. p. 28. t. 13.) leaves 

 aggregate, linear-lingulate, upright, rnucronulate, keeled, glau- 

 cous, with cartilaginous margins ; stem clothed with clammy 

 tomentum ; petals linear-spatulate, crenulated at the apex. If. . 

 H. Native of the Pyrenees, on calcareous rocks. Chondrosea 

 aretioides, Haw. enum. sax. p. 14. Plant densely tufted. Leaves 

 imbricate, ciliately toothed at the base, wi;h a few perforated 

 dots near the margin. Flowers by threes, p.V.den yellow. Pe- 

 dicels and calyxes clothed with clammy down Calycine seg- 

 ments ovate, acute. Very like the two preceding tpecies, but 

 the plant is much smaller. 



Aretia-lilte Saxifrage. Fl. May, Jul. Clt. 1826. PL ft. 



3. Leaves triquetrous, obtuse. 



85 S. DIAPENSIOI'DES (Bellardi, in act. acad. taur. 5. p. 227.) 

 stems, peduncles, and calyxes glandular ; leaves linear, erect, 

 keeled, aggregate, imbricated, cretaceously glaucous ; stem 

 many-leaved, few-flowered ; calycine segments elliptic-oblong. 

 T(.. H. Native of the Alps of Piedmont and Switzerland. 

 Lapeyr. append, fl. pedem. p. 21. t. 3. Sternb. sax. p. 35. t. 9. 

 Chondrosea diapensioides, Haw. enum. sax. p. 13. S. cae'sia /3, 

 Lam. diet. 4. p. 676. Plant densely tufted. Leaves with car- 

 tilaginous margins, ciliated at the base, and with 1 or 2 perfo- 

 rated dots at the apex, which is obtuse. Flowers 3-4 or 5, cam- 

 panulate, white, disposed in a terminal head. Petals narrow at 

 the base, with an orbicular, S -nerved limb. 



Diapensia-like Saxifrage. Fl. April, Ju. Clt. 1825. Pl.^ft. 



86 S. SQUARROSA (Sieb. in fl. 1821. p. 99. and fl. austr. exsic. 

 no. 133.) stem pubescent below, usually 3-flowered ; leaves 

 linear-elliptic, rather retuse, stiff, squarrosely imbricated, per- 

 manent, when young powdery ; branches diffuse, flaccid ; pe- 

 duncles and stems glabrous. If. . H. Native of the Alps of 

 Tyrol. Flowers white, larger than those of S. ccesia. Lobes 

 of calyx broader than in S. cce'sia and S. diapensioides. 



Squarrose-leaved Saxifrage. PL ^ foot. 



87 S. KAMULOSA (Wall. cat. no. 446.) plant densely tufted ; 

 stems 1-flowered, very short ; leaves of the barren stems or 

 surculi acute and flattish at the apex, lined with rugged dots ; 

 the upper surface of the leaves have a regular marginal, double 

 line of dots ; margins of leaves thin and cartilaginous ; lobes 

 of calyx acute ; styles nearly parallel, longer than the calyx ; 

 stigmas thickish, capitate, 2f. F. Native of Nipaul, at Bhud- 

 drinath. Very nearly allied to C. cassia, but perfectly distinct. 



Branched Saxifrage. PL 1 inch. 



88 S. CJE'SIA (Lin. spec. 571.) plant greenish glaucous; stems 

 and peduncles smoothish ; leaves linear-oblong, aggregate, re- 

 curved, keeled, the upper surface with marginal dots regularly 

 disposed ; petals roundish, unguiculate ; stems few-leaved, 

 many-flowered. %.. H. Native of the Alps of Switzerland, 

 Austria, and the Pyrenees. Jacq. austr. t. 374. Scop. earn. 



ed. 2. p. 495. t. 15. Sternb. rev. sax. p. 34. t. 9. f. 1-2. 

 and in Sturm, deutschl. fl. p. 33. n. 16. with a figure. Lodd. 

 bot. cab. 421. S. recurvifolia, Lapeyr. pyr. sax. p. 30. 

 Segu. ver. p. 449. t. 9. f. 2. Chondrosea cae'sia, Haw. enum. 

 sax. p. 14. Scheuch. alp. p. 49. 141. t. 21. f. 1. Surculi 

 short, erect, forming compact tufts. Leaves concave above 

 and keeled beneath, perforated by numerous minute holes, cili- 

 ated : cauline ones few, scale-formed. Flowers milk-coloured, 

 disposed in a small panicle. Pedicels and calyxes with a few 

 short, glandular hairs. Calycine segments very blunt. Genitals 

 shorter than the corolla. 



Var. ft, patens (Ser. in D. C. prod. 4. p. 22.) leaves loosely 

 rosulate, not recurved at the apex, with a few crustaceous spots ; 

 stems short, usually 2-flowered. If, . H. Native of Vallais, 

 on Mount Fouly. S. patens, Gaudin. in Meisner, anz. 1818. 

 p. 65. fl. helv. 3. p. 92. but not of Sternb. rev. sax. suppl. 1. 

 t. 1. f. 2. Chondr6sea patens, Haw. enum. sax. p. 14. There 

 is a variety of this without any stem and with 1 sessile flower in 

 the middle of the leaves, which is a native of Upper Styria, and 

 is described by Vest, in flora. 1820. no. 26. p. 397. 



Grey Saxifrage. Fl. May, June. Clt. 1752. PI. i to i ft. 



89 S. ROCHELIA'NA (Sternb. suppl. sax. 2. ex Host, fl. austr. 

 1. p. 501.) flowers corymbose ; sepals ovate ; petals lanceolate- 

 ovate, twice the length of the calyx ; lower leaves Ungulate, 

 glabrous, ciliated at the base, disposed in tufts : cauline ones 

 clothed with clammy villi, pale green. If. H. Native of 

 Austria, in the fissures of rocks. Leaves white at the edges, 

 and with distinct impressed dots. Flowers white. Perhaps a 

 variety of S. cc^sia or S. Valdensis. 



Rachel's Saxifrage. PL -J to ^ foot. 



90 S. VALDE'NSIS (D. C. fl. fr. 5. p. 517.) peduncles and 

 calyxes very clammy, and beset with glandular hairs ; leaves 

 of the surculi and stems flat at the base, but more or less tri- 

 quetrous at the apex, with the upper surface marked with dots, 

 which are disposed without order. 1f..H. Native of the Alps 

 of Lyons, on the hill called Lacroix, near Abries and Pignerol ; 

 and on Mount Cenis. S. rupestris, Thomas, exsic. S. cassia, 

 var. Willd. spec. 2. p. 642. in a note. S. cae'sia y, Moretti, 

 tent. sax. p. 12. Flowers white, corymbose; peduncles short. 

 Leaves dense, short. 



Var. ft, laxifolia (Ser. in D. C. prod. 4. p. 22.) leaves loose, 

 elongated ; flowers very numerous, loose, disposed in panicled 

 corymbs. 7/. H. Native of Portugal and Italy. S. cae'sia, 

 var. ex alpibus Italicis, Lin. mant. p. 381. but not of his spec. 

 S. cse v sia /3, major, D. Don, in Lin. trans. 13. p. 403. S. com- 

 pacta, Sternb. suppl. 1. p. 9. t. 1. f. 3. under the name of S. 

 patens. 



Lyons Saxifrage. FL May, June. Clt. ? PL -j foot. 



91 S. SERPYLLIFOLIA (Pursh, fl. aiDer. sept. 1. p. 310.) sur- 

 culi creeping ; leaves rosulate, imbricately reflexed, oblong, 

 obtuse, tapering into the petiole, coriaceous, quite glabrous ; 

 stem filiform, few-leaved, beset with glandular pubescence, 1- 

 flowered ; calycine segments obtuse, not adhering to the ova- 

 rium ; petals broadly obovate, somewhat 3-nerved. If. H. 

 Native of the north-west coast of America, at Cape Newnham, 

 Behring's Straits, and Unalaschka. S. Fischeri, Ser. in D. C. 

 prod. 4. p. 22. S. Eschcholtzii, Cham, in litt. S. planif olia, 

 Cham, in herb. Hook. S. diapensioides, Fisch. in litt. but not 

 of Bellardi. Plant green, tufted. Flowers large for the plant, 

 apparently yellow, solitary, on slender, few-leaved, glandular 

 stalks. Calyx wholly inferior. 



Wild-thyme-leaved Saxifrage. PL \ foot. 



% 4. Leaves triquetrous, mucronately pungent. 



92 S. NitiDA (Schreb. in litt. ex Sternb. rev. sax. p. 32. t. 10. 



